Turbine impeller wheel



Jan. 31, 1950 J, MARCQE 2,495,855

TURBINE IMPELLER WHEEL Filed July 17, 1946 INVEN TOR.

Patented Jan. 31, 1950 I TURBINE IMPELLER WHEEL v a Reuben James Marcoe, Hermansville, Mich, as-

. M sig'nor to Furblo Company, Hermansville, Mich.

Application July 17,1946, seam. 684,326

1 Claim. 1

This invention relates to turbine impeller wheels and more particularly to the manner of attachment of impeller blades to the frame of the rotor.

An object of this invention is to provide an improved impeller blade for certain types of impeller construction and an improved means of attachment of the blades to the peripheral rotor discs.

Another object of this invention is to provide an improved means of attaching axially disposed impeller blades to the annular rotor frame members by providing a notch in the outer ends of each blade and a tab or ear which is adapted to be bent over and attached by welding or other suitable attaching means to the outside surface of the rotor frame discs or rings thereby increasing the effective blade area between the rings and providing a substantial attaching means for the blades.

Still another object of this invention is to provide an improved impeller blade construction whereby the full area of the blade between the supporting rings is utilized as on a pump for air in air conditioning units.

To the foregoing objects, and others which may hereinafter more fully appear, the invention consists of the novel construction, combination and arrangement of parts, as will be more specifically referred to and illustrated in the accompanying drawings, but it is to be understood that changes, variations, and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 is a top perspective view, partly broken away of a series of impeller blades constructed and attached to a rotor ring according to an embodiment of this invention.

Figure 2 is an end elevation, and

Figure 3 is a front elevation of the blades in Figure 1.

Referring to the drawings the numeral in designates generally an impeller blade of the type generally used in air pumps provided in air conditioning units for forcing air through the ducts of the air conditioning system. Heretofore many different types of fans and impellers have been used on such systems and it has been found that an impeller of the nature of a turbine, as shown in the attached drawings, is the most efficient and satisfactory type of pump. There have been many ways of constructing the blades for such pumps or turbines at the ends of the blades to the rotor rings, designated generally by the numeral II, and such methods of attachment require considerable machine work on the blades l0 and rings I l and tedious methods of accurately locating the blades Ill about the periphery of the rings ll, resulting in the high cost of manufacture and assembly of such rotors for these turbines. By the construction of blades I0 according to an embodiment of my invention the blades may be stamped into the desired shape or otherwise formed without the use of laborious and expensive machining of the blades [0 or the ring I l and the blades may be readily positioned accurately by a simple fixture or template.

The blades 10 are formed of an elongated strip of metal of an arcuate cross section which extend axially about the rotor of the turbine and are fixed at each end to an annular fiat ring II. The ring II is supported about the rotor of the pump, not shown, concentric to the shaft of the impeller.

Each blade 10 is formed, before assembly, with a substantially rectangular notch [2 on each end thereof which extends forwardly from the rear or trailing edge of the blade I0 approximately one half the width of the blade in, thereby providing a remaining ear or tab M which extends outwardly longitudinally from the forward portion of the blade I0, which tab i4 is adapted to be bent over the peripheral edge of the ring H.

In assembly the blades l0 are positioned in engagement with the inner face of opposite rings H with the arcuate inner edge of the notch l2 abutting the inner face of the ring ll whereby the tab l4 overlies the peripheral edge of the ring I l. The tab or ear I4 is then bent or folded over the ring II to engage in face abutting relation the outer face of the ring II and the tabs M are welded as at [5 to the ring II with the front or leading edge of the blade or vane IE) raised above the periphery of the ring II, and the rear edge of the tab l4 engaging the peripheral edge of the ring II in the inner forward corner of the notch I2.

By a blade or vane construction of this type the cost and time required may be substantiab ly lessened and the manner of attachment is simple and more efficient as regards strength and installation time and expense.

I do not mean to confine myself to the exact details of construction herein disclosed but claim all variations falling within the purview of the appended claim.

Having thus described my invention, what I claim is:

An improved turbine wheel comprising a pair of spaced apart concentric annular rings, a plurality of axially disposed blades fixed on said rings and extending therebetween, each of said blades being formed of an elongated arcuate strip of metal, a rearwardly and outwardly opening notch cut in each of the opposite corners of the trailing edge of s'ni d bladeto firov'ide an atthcln ing ear 6n each end'thereof as'acoritinifatioh or the leading edge of said blade, said ears being bent at right angles to the remainder of said blade over the periphery of the adjacent "rings and engaging and secuied to the outer f aces of said rings, said leading djz'es being diseased above said periphery and said remainder of said 4 blades being inclined towards the axis of rotation of said rings.

REUBEN JAMES MARCOE.

REFERENCES CITED The following references are of record in the file of this patent:

UNIT' ED STATES 'PA'TENIS Y Number Name Date 4,072,233 Inle Sept. 2, 1913 1, Q7 4 ,Ql Bruman Oct. 7, 1913 1,637,652 Ness Aug. 2, 1927 15 1, 7;Q 0;Q;l7 Bender- Jan. 22, 1929 "2983 833 d3erry Jan. 22, 1929 

